📄 rtexteditorpane.java~1~
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/*
* 11/14/2003
*
* RTextEditorPane.java - the text editor used by RText.
* Copyright (C) 2003 Robert Futrell
* email@address.com
* www.website.com
*
* This file is a part of RText.
*
* RText is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or any later version.
*
* RText is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
package org.fife.rtext;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.io.File;
import java.nio.charset.Charset;
import javax.swing.JComponent;
import org.fife.print.RPrintUtilities;
import org.fife.ui.rtextarea.RTATextTransferHandler;
import org.fife.ui.rsyntaxtextarea.RSyntaxTextArea;
/**
* An extension of {@link org.fife.ui.rsyntaxtextarea.RSyntaxTextArea}
* that adds information about the file being edited, such as:
*
* <ul>
* <li>Its name and location.</li>
* <li>Is it dirty (modified)?</li>
* <li>Is it read-only?</li>
* <li>The time it was last modified.</li>
* <li>The file's encoding on disk.</li>
* </ul>
*
* @author Robert Futrell
* @version 1.1
*/
public class RTextEditorPane extends RSyntaxTextArea implements Printable {
public static final String FULL_PATH_PROPERTY = "RTextEditorPane.fileFullPath";
public static final String MODIFIED_PROPERTY = "RTextEditorPane.isModified";
public static final String READ_ONLY_PROPERTY = "RTextEditorPane.isReadOnly";
private static final String commonImagePath = "org/fife/rtext/graphics/common_icons/";
private RText rtext;
private File file; // File on disk we're editing.
private boolean isModified; // Whether or not file has been modified.
private boolean isReadOnly; // Whether or not this file is read-only.
private long lastModified; // The last-modified timestamp.
private String charSet; // The name of a charset to encode/decode this file.
/*****************************************************************************/
/**
* Creates a new <code>RTextEditorPane</code>. The file will be given
* a default name and placed in the current working directory with no
* syntax highlighting.
*
* @param rtext The owning RText instance.
* @param wordWrapEnabled Whether or not to use word wrap in this pane.
* @param textMode Either <code>INSERT_MODE</code> or
* <code>OVERWRITE_MODE</code>.
*/
public RTextEditorPane(RText rtext, boolean wordWrapEnabled,
int textMode) {
this(rtext, wordWrapEnabled, textMode,
new File(rtext.getNewFileName()));
}
/*****************************************************************************/
/**
* Creates a new <code>RTextEditorPane</code>. Syntax highlighting will be
* selected as follows: filenames ending in <code>".java"</code> default
* to Java syntax highlighting; all others default to no syntax
* highlighting.
*
* @param rtext The owning RText instance.
* @param wordWrapEnabled Whether or not to use word wrap in this pane.
* @param textMode Either <code>INSERT_MODE</code> or
* <code>OVERWRITE_MODE</code>.
* @param fileFullPath Full path to the file you wish to open in this
* editor. If it's just a file name, file will be in
* the current directory.
*/
public RTextEditorPane(RText rtext, boolean wordWrapEnabled,
int textMode, String fileFullPath) {
this(rtext, wordWrapEnabled, textMode, new File(fileFullPath));
}
/*****************************************************************************/
/**
* Creates a new <code>RTextEditorPane</code>. Syntax highlighting will
* be selected as follows: filenames ending in <code>".java"</code>
* default to Java syntax highlighting; all others default to no syntax
* highlighting.
*
* @param rtext The owning RText instance.
* @param wordWrapEnabled Whether or not to use word wrap in this pane.
* @param textMode Either <code>INSERT_MODE</code> or
* <code>OVERWRITE_MODE</code>.
* @param file The file to open in this text area.
*/
public RTextEditorPane(RText rtext, boolean wordWrapEnabled,
int textMode, File file) {
super(wordWrapEnabled, textMode);
this.rtext = rtext;
// Store all the data that used to be in RTextDocument.
this.file = file;
if (!file.exists())
setReadOnly(false);
else {
setReadOnly(!file.canWrite());
this.lastModified = file.lastModified();
}
isModified = false;
// Change the transfer handler to one that recognizes drag-and-dropped
// files as needing to be opened in the parent main view.
setTransferHandler(new RTextEditorPaneTransferHandler());
}
/*****************************************************************************/
/**
* Returns the encoding used when reading/writing this file to/from disk.
*
* @return The encoding.
* @see #setEncoding
*/
public String getEncoding() {
return charSet;
}
/*****************************************************************************/
/**
* Returns the full path to this document.
*
* @return The full path to the document.
*/
public String getFileFullPath() {
return file.getAbsolutePath();
}
/*****************************************************************************/
/**
* Returns the file name of this document.
*
* @return The file name.
*/
public String getFileName() {
return file.getName();
}
/*****************************************************************************/
/**
* Returns the "last modified" date of the file this editor pane
* represents.
*
* @return The last-modified timestamp for this file.
* @see #setLastModified
*/
public long getLastModified() {
return lastModified;
}
/*****************************************************************************/
/**
* Returns whether or not the document is modified.
*
* @return Whether or not the document is modified.
*/
public boolean isModified() {
return isModified;
}
/*****************************************************************************/
/**
* Returns whether or not the document is read-only.
*
* @return Whether or not the document is read-only.
*/
public boolean isReadOnly() {
return isReadOnly;
}
/*****************************************************************************/
/**
* Method called when it's time to print this badboy (the old-school, AWT
* way). This method overrides <code>RTextArea</code>'s <code>print</code>
* method so that we can use the font specified in RText when printing.
*
* @param g The context into which the page is drawn.
* @param pageFormat The size and orientation of the page being drawn.
* @param pageIndex The zero based index of the page to be drawn.
*/
public int print(Graphics g, PageFormat pageFormat, int pageIndex) {
Font printWithMeFont = rtext.getMainView().getPrintFont();
if (printWithMeFont==null) // null => print with the current font.
printWithMeFont = this.getFont();
return RPrintUtilities.printDocumentWordWrap(g, this,
printWithMeFont, pageIndex, pageFormat, this.getTabSize());
}
/*****************************************************************************/
/**
* Sets the encoding used when reading/writing this file to/from disk.
*
* @param encoding The new encoding. If this is invalid,
* <code>US-ASCII</code> is used.
*/
public void setEncoding(String encoding) {
if (!Charset.isSupported(encoding)) {
System.err.println("Unsupported encoding! Using ASCII.");
encoding = "US-ASCII";
}
if (charSet==null || !charSet.equals(encoding))
charSet = encoding;
}
/*****************************************************************************/
/**
* Sets the full path to this document. This fires a property change
* event of type <code>FULL_PATH_PROPERTY</code>.
*
* @param fileFullPath The full path to the document.
*/
public void setFileFullPath(String fileFullPath) {
String old = getFileFullPath();
file = new File(fileFullPath);
firePropertyChange(FULL_PATH_PROPERTY, old, fileFullPath);
}
/*****************************************************************************/
/**
* Sets the "last modified" date of the file this editor pane represents.
*
* @param lastModified The new last-modified timestamp for this document.
* This should accurately reflect the actual file's last-modified
* timestamp.
* @see #getLastModified
*/
public void setLastModified(long lastModified) {
this.lastModified = lastModified;
}
/*****************************************************************************/
/**
* Sets whether or not this document has been modified. This fires a
* property change event of type <code>MODIFIED_PROPERTY</code>.
*
* @param modified Whether or not the document has beeen modified.
*/
public void setModified(boolean modified) {
if (this.isModified!=modified) {
firePropertyChange(MODIFIED_PROPERTY, this.isModified,
modified);
isModified = modified;
}
}
/*****************************************************************************/
/**
* Sets whether or not this document is read-only. This fires a
* property change event of type <code>READ_ONLY_PROPERTY</code>.
*
* @param readOnly Whether or not the document is read-only.
*/
public void setReadOnly(boolean readOnly) {
if (this.isReadOnly!=readOnly) {
isReadOnly = readOnly;
setEditable(!isReadOnly);
firePropertyChange(READ_ONLY_PROPERTY, !isReadOnly, isReadOnly);
}
}
/*****************************************************************************/
/*********************** INNER CLASSES ***************************************/
/*****************************************************************************/
/**
* Transfer handler for editor panes. Overrides the default transfer
* handler so we can drag-and-drop files into a text area, and know to
* open it in the parent main view.
*/
class RTextEditorPaneTransferHandler extends RTATextTransferHandler {
public boolean canImport(JComponent c, DataFlavor[] flavors) {
return MainPanelTransferHandler.hasFileFlavor(flavors) ||
super.canImport(c, flavors);
}
public boolean importData(JComponent c, Transferable t) {
return MainPanelTransferHandler.
importDataImpl(rtext.getMainView(), c, t) ||
super.importData(c, t);
}
}
/*****************************************************************************/
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